If you know about japanese knotweed, you will understand, it is very difficult to get rid of this plant. However, there are some long-term methods that aim to impoverish the plant to limit its expansion. Among the most common you will observe two types of struggles. Click here for japanese knotweed identification.
It will always be the preventive fight that will be most effective. Avoiding the installation of the Japanese knotweed is the best way not to fight directly against it.
To take the problem at the source, it is the development of the riverside that must be managed at best. Favoring the installation and maintenance of local plants, whether perennial or woody, allows to offer a plant cover and root competition in which the installation of knotweed would be more complicated. Visit this site for japanese knotweed identification.
Biodiversity environments composed of dense vegetation, will remain the best preventive means of fight against the latter.
Avoid involuntary relocation
Similarly, precautions should be emphasized by human activities once an invaded area is treated. This is why cleaning mowing equipment in mowed areas is important and would avoid the travel of fragments that can thrive elsewhere. All hay waste must also be completely burned in order to prevent it from being displaced by various factors, including runoff.
The healing struggle
As for the means of struggle for already invaded surfaces of this plant, the work will be much more complicated and especially very long. The following methods may be used but without warranty.
The chemical treatment
This method is often radical for most plants, since the right molecule is used, is almost ineffective on the Japanese knotweed! During a herbicide treatment on the foliage, the latter dies in part but the stem is not in the least reached and that is why new leaves will emerge a few days after treatment.
For greater efficiency, an autumn mowing combined with a treatment of glyphosate directly poured into the hollow of each stem, makes it possible to reach a superficial part of the rhizomes. Perform this operation in the fall because it is during this period that the sap descends more abundantly in the rhizomes. The effectiveness of the molecule is therefore better.
Warning: Chemical control is absolutely forbidden by the law at the beginning of the rivers and unfortunately, it is in these zones that the colonies are the most important!
The extremely rapid growth of the knotweed should go hand in hand with the frequency of mowing, i.e. at least one cut per week from April to October which will only limit its extension. This solution will not overcome the astronomical quantities of rhizomes in the soil.